Comparative analysis of adaptive filtration techniques using DSTATCOM for distribution system

Abstract

This paper presents a comparative analysis between different adaptive filters such as LMS, LMF and RLS to study the dynamic performance of PV-DSTATCOM system. Various power quality issues such as power factor correction, reactive power control and harmonic elimination are addressed. To nullify the power quality issues and to adhere to the grid codes DSTATCOM is placed in shunt at the point of common coupling (PCC). In PV-DSTATCOM mode it maintains power flow to grid as well as to load under unity power factor and in DSTATCOM mode it sustains the load demand by maintaining power flow from grid to load. In addition, extraction of in phase and quadrature components of polluted load current is presented so as to produce suitable gate pulse for VSI. Performance evaluation of these filters is done on the basis of comparison of estimated active weight during unbalanced loading condition.